Re: root on btrfs and lvmthinp for docker backing confusion

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On 12/10/2015 03:39 AM, Chris Murphy wrote:
> OK instead of hijacking some other thread...(sorta too late).
> 
> # lsblk -f
> NAME                      FSTYPE      LABEL UUID
>             MOUNTPOINT
> sda
> =E2=94=9C=E2=94=80sda1                    vfat              5956-63D8
>             /boot/efi
> =E2=94=9C=E2=94=80sda2                    btrfs       f23a
> 8b0c4840-4fc7-4782-a4c0-25fec8a40dd4   /sysroot
> =E2=94=9C=E2=94=80sda3                    ext4
> 908cb4df-410b-47e4-afb1-872255bd1244   /boot
> =E2=94=9C=E2=94=80sda4                    LVM2_member
> 9WkBEW-XwcN-8f99-nQOP-E1w8-QiBs-6Xio7a
> =E2=94=94=E2=94=80sda5                    swap
> 53f95874-06db-4433-a74b-8dc31105c528   [SWAP]
> 
> -bash-4.3# pvs
>   PV         VG   Fmt  Attr PSize   PFree
>   /dev/sda4  VG   lvm2 a--  426.51g 126.36g
> -bash-4.3# vgs
>   VG   #PV #LV #SN Attr   VSize   VFree
>   VG     1   1   0 wz--n- 426.51g 126.36g
> -bash-4.3# lvs
>   LV          VG   Attr       LSize   Pool Origin Data%  Meta%  Move
> Log Cpy%Sync Convert
>   docker-pool VG   twi-a-tz-- 300.00g             0.00   0.44
> 

So you created the VG VG and the docker-pool LV on your own before
docker-storage-setup is run?

What I would do is leave sda4 blank and then put the following in your
config file:

DEVS=/dev/sda4
VG=vgdocker

What I think this will do is create a PV out of /dev/sda4 and create a
VG (named vgdocker) on top of it. It will then create the docker-pool
LV for you and have the docker daemon use that as the backing store.

Let me know if this is what you were looking for or not!

Dusty
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